Cooking-bange



2 Sheets-Sheet 2. H. H. STIMPSON.

Cooking Range. No. 23,509. y Patented April 5, 1859.

f and useful UNITED STATES PATENT OFFIOE.

H. H. STIMISON, OF BOSTON, MASSACHUSETTS.

COOKING-RANGE.

Specification forming part of Letters Patent No. 23,509-, dated April'5, 1859; Ressued May 1, 1860, No. 956.

To all whom it may concern:

Be it known that I, H. H. STIMPsoN, of Boston, in the county of Suffolkand State of Massachusetts, have invented certain new Improvements inCooking Ranges, and that the following description, taken in connectionwith the accompanying drawings, hereinafter referred to, forms a fulland exact specification of the same,l

.vherein I have set forth the nature and principles of my saidimprovements, by which my invention may be distinguished from all othersof a similar class, together with such parts as I claim and desire tohave secured to me by Letters Patent.

The gures of the accompanying plates of drawings represent myimprovements.

In Plate l, Figure l is a longitudinal vertical section taken throughthe fire-chamber, &c. Fig. 2, Plate 2, is a transverse horizontalsection taken in the plane of the line A, B, Fig. l. Fig. 8, Plate 2, isa transverse vertical section taken in the plane of the line C, D, Fig.l, Plate l. Fig. Il, Plate 2, is a transverse vertical section taken int-he plane of the line E, F, Fig. l, Plate 2. Figs. and G, Plate 2, areviews in detail to be hereinafter referred to.

My improvements are made upon a cooking-range in which the ovens areheat-ed by three separate and distinct flues, the side iues heating thefront portion thereof and the central flue the remainder, which is theprinciple embodied in the patent granted to me bearing date the 17th dayof May 18414.

My first improvement consists in so arranging the central or main fluethat the heat, &c., from the re chamber shall pass out of the same at aconsiderable distance below its top, instead of allowing it as by theordinary construction of ranges to impinge directly upon the top plateof the fire chamber or that which covers it, and which is the cause oftheir being rapidly burned out or warped. By thus conducting the heataway at so low a point in the lirechamber, the preservation of the topplate is insured as the injurious effect of the heat upon it isprevented. This improvement also prevents the admission of cold air tothe oven flues, as any cold air admitted, must necessarily, passingthrough the burning fuel, become heated before entering the main orcentral flue. The saving of fuel by this arrangement will be obvious,the

' amount required to heat the ovens as I have practically demonstrated,being reduced at least one-third.

My second improvement consists in an arrangement of devices by which theexpan sion and contraction of the grate is prevented from injuriouslyaffecting the remaining portions of the range, or stove, by throwing orpushing them apart which has heretofore, by the ordinary construction ofstove and range grates, been unavoidable. I effect this result by makingthe grate considerably narrower than the fireechamber and formingflanges or projections upon the side plates of the boiler chambers,which overlap the spaces left between the ends of the grates and thesides of the boiler chambers, the grate being loosely hung so as toallow its free expansion and contraction.

My third improvement consists in the use of sliding covers to the boilerapertures, which are arranged so as to slide back and forth withoutbeing removed from the range. The ordinary circular covers heretoforeused have proved very objectionable as they are constantly liable to bedropped and broken, and those intended for the boiler apertures and castthin for that purpose are frequently placed over the tire-chamberinstead of the ones intended therefor, and in consequence are soonburned out and destroyed. By my improvementthese objections areobviated, as the covers can not be removed from the range, and thuscannot be broken by being dropped while there is no possibility of theirbeing placed in other than their proper localities.

Having thus stated the general features of my invention I will nowproceed to describe its construction in detail.

a a in the drawings represents the lirechamber and Z the boilerchambers. At the back of the lire chamber a a is hung a short partitionplate c o in such a manner as to leave a narrow space between it and themain flue d cl, so that the communication of the flue al (l with thefire-chamber is necessarily below the bottom of the partition plate c o.By this arrangement the heated currents, &c., from the lire-chamber arepree vented from ascending against and burning out or otherwise injuringthe top plate e, e of the fire chamber, as they are made to escape at aconsiderable distance below the same, viz.; under the bottom of thepartition plate c c. The heat, &c., after entering the main flue l CZascends as shown by red arrows in the drawings, and diffuses itselt`about the [lues of two elevated ovens ff-g g being made to pass moreparticularly to the back of the ovens, by means of partitions 7L it, andfinally passes out of the chimneylue z' c'.

The lateral lues receive the heated currents from the tire-chamberthrough openings 7c L and conduct'them, as shown by blue arrows in thedrawings, up the inclined Flues Z, Z whence they are made to pass aroundthe front parts of the ovens by partitions m m. and thence out thechimney i'lues z' t' as will be readily seen by inspection of thedrawings. The shutting otf or opening the communication betweenV thefire-chamber and the ovens is regulated by proper valves or dampers insuch a manner as to conduct the heat about the ovens by either thelateral tlues or the main lues, or by all at once as may be desirable.

n n is the grate hung loosely upon pivots 0 0, which enter correspondingholes formed in the side plates ofthe boiler chambers. The grate, aswill be seen by Plate 2 is made much narrower than the space between theboiler chambers, and rests against iianges or projections 79, j)attachedto the side plates of the boiler chambers and ill up the spacesbetween them and the grate and thus prevent the fuel from falling out,or air from going in. By this arrangement the eXpan sion and contractionof the grate cannot push apart the other portions of the range orotherwise injuriously affect them. rI he advantage of this result willbe apparent to manufacturers ot ranges &c., as the eXpansion and thecontraction of the grate and the consequent deterioration of theadjacent parts has proved a serious annoyance.

Instead of the circular covers heretofore used for the boiler apertures,and the disadvantages of which from breaking and burning out, &c., arewell known and apparent7 I use sliding covers g, g, g which slide inproper grooves or ways i", r, formed in the top plate, and can be pushedunder the ovens into a space s s formed to receive them. Ey this meansthe boiler apertures can be rapidly and readily covered and uncoveredwithout danger otibreaking, or possibility of dropping them, or placedin other than their proper relative positions. The central sliding coverQ is placed in a sliding plate t, so that the whole ire chamber can beuncovered tor boiling purposes, Src.4

Having thus stated myimprovements shall state my claim as follows:

What l claim as iny'invention and desire to have secured to me byLetters Patent is,

1. The combination of the flanges or projections attached to the sideplates of the boiler chambers with the grate constructed so as to admitair to the fuel from below and hung so vas to allow of its tree play,and made narrower than thel iirechamber as described, whereby thecontraction and eX- pansion of the grate is prevented from injuriouslyaiecting the remaining portions of the range or stove.

2. The use of the .sliding covers g g in combination with the top platearranged to operate substantially as described.

JOSEPH GAvnTr, JAMES H. CLAPP.

